i stood next to president obama as the marines carried those flag-draped caskets off the plane at andrews. i put my arms around the mothers and fathers, the sisters and brothers, the sons and daughters and the wives left alone to raise their children. >> reporter: she said she takes responsibility for what happened. >> as i have said many times, i take responsibility, and nobody is more committed to getting this right. >> reporter: her critics were not disarmed. they wanted to know why couldn't ambassador chris stevens and three other americans be rescued? why were repeated security warnings ignored? including a cable from the ambassador on 9/11, the day of the attack, the day he was killed. >> i'm glad that you're accepting responsibility. i think that ultimately with your leaving, you accept the culpability for the worst tragedy since 9/11, and i really mean that. had i been president at the time and i found that you did not read the cables from benghazi, you did not read the cables from ambassador stevens, i would have relieved you of your post. i think it's inexcusable. >> reporter: h